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s7- Fig.5. E 95 Fig.5.

H. M. BIEBEL SECTIONAL BAKE OVEN Sept. 15, 1925. 1,553,357

Filed May 10, 1922 2 Sheets-Sheet 2 WW Fi g. 6.

my. I (564 l az m 79/ I wmuzssss: INVENTOR Herman MB'IebeI A M"ATTORNEY-Q 1 '7. located therein.

Patented Sept, 15, 1925i,

1 unrran srarhs PATENT GWEICEQ HERMAN M, lliIll-ILBIEL, OF OAKMON'I,PENNSYLVANIA, ASSIGNOB, T0 WESTINGHOUSE ELECTRIC &. MANUFACTURINGCOMPANY, A CORPORATION OF PENNSYLVANIA.

snc'TIoNAL BAKE OVEN.

' Applicatibnfiled May 10, 1922. Serial No. 559,692. 1 i

and useful Improvement in Sectional Bake Ovens, of; which the followingisa speoifica-.

tion. v Y

My invention relates to ovens and particularly to electrically heatedbake ovens and it has for one of its objects to provide a relativelysimple unitary structure- 'for a multiple-chamber baking oven, eachchamher having a plurality of heatingyelements Another objectof myinvention is to provide a plurality of complete individual oven unitsthat may be assembled to form aunitary multiple-chamber bake oven, asingle ture of the entire oven.

Anotherobject of'my inyentionis to proadditional member completing thestrucvide aseparate manual and a separate auv tomatic controlling meansfor-the heating elements of eac-h'chamber. to permit of maintimes.

ness may require. Thusfltmay appear desirable for an operatortoinstall'a single" 35 oven unit comprising a single baking chann Ib erand then to add thereto, as the business grows, one or more additionaloven' units.

Another object of ny invention :is toprovide a relatively simplestructure for ainul tiple-chamber baking oven comprising-a plurality ofincomplete individual oven units that shall permit of increasing thenumber" of individual oven units as may be desired-.-

invention embodies a multiple-c hama ber king oven comprising aplurality-of "superposed incomplete individual open top oven chamberseach defined by a plurality of heat-insulatingwalls, the entirestructure be ing. located on a suitable supporting frame. Front and'rearmetal frames, together with side bars connecting these frames, areemployed to hold the walls of each oven unit in proper operativepositions relativelyto 1 each other; Thebottom portion of the upperovenunit serves to complete the struc- In'the drawings,

taining a substantially constant; predeter- :mined temperaturein eachchamber at all embodying myinvention ture of the lower oven unit and acover member comprising a single heat-insulating panel completes thestructure of the top:

-rnost oven unit. 5 State of 'lennsylvania, have invented'a new -Heatingelements are located adjacent the top and the bottom. of each of theoven chambers and a manual and an automatic circuit controlling 'meansis provided for each of the o'ven'units.

Means are provided for ventilating the oven chambers and further meansare proin proper operative position relatively to each other and onthesupporting structure.

Figure. 1 is a view, in frontelevation, of-

vention,

aWay;" v

' Fig, 2 1S aview, in side elevation,"of the oven illustrated 1n. Fig.1, certain parts certain parts thereof being cut thereof beingcut awayto show the internal construction thereof;

F1gs.- 3 and are front elevation and end views, respect vely, of a'side'panel com- Figs. 5 and 6 are front elevation and end views,respectively, of a bottom panel; 5 1

Figs. 7 and 8 are front elevation and end views,'respectively, of a rearpanel;

Fig; 9 is a diagrammatic representation of, a modified form ofcon'structionof an individual oven unit and a. cover member,

Fig. 10 is a diagrammatic representation of a still furtherlmodificationof an oven unit embodying my invention.

vided for securing all of the units together an assembled bake-ovenembodying my ini I so prising aportion of an individual oven unit;

My invention is closelyrelated. to, and is an improvement upon, theovenconstituting the sub ect matter of the copending appli-- cation of FrankThornton, J12, Serial No.

544,496, filed March 17, 1922, and assigned to the \VestinghouseElectric Products Com- 'pany. Certain features of construction em-'ployed byme are substantially identical with similar details disclosedinthat application and reference will be made hereinafter thereto forinformation regarding such de: tails. 3 1

An electric baking oven, designated as a whole by the numeral. 21,comprises a plurality of individual incomplete baking oven units22Whi'ch are'located on a suitable supporting frame 23 which may be ofany desired construction. I

' and the side hers oo e ach of the L suel ton prises 21 front posed ofhorizonte angle her 24', a bottom :ail side n are suitably ends. by sothat the as suhsta ntially .5 llZIZUG cor ncinhors. th u suhs' The 10dhv a. to

i us i i l: (ll'n a L men i oned u'li ieh one oi? f-suit l lo i i i iiue1 ul.

init of suiieh hereniheitore means compiupper edge the with a should rport.

co 5 thicliver edge substantially equal on ness of the panel.

tended :1 short distance a pose hereinafter set forth in detail. lhebottom panel is provided with a shoulder portion 37 extendin olon thetoo and bottom as 2:: l: J. P r 7 thereon lhe rear Well as the rearedge, panel is provided with shoulder portion 8'? located at only thetop edge thereof.

In building up the individual oven units, the skeleton. root framehereinhetore described. is assembled and laid on suhsten [hillyhorizontally "tending surface, after or which the rear panel is placedin proper operative position t door the

han c i ll eo-operate bar sec elference n n, CORSLLL ineiui.

e and {1 bottom J.

for sect. in proper op thereon tie heat ole respect y. LltljiiCLlll) thetop tom. 05. ie chamber. ii. lever tory material, such us tile. inn,ZilDOVG the bottom panel to serve storing heat imparted thereto ingelement. located below the f prevent, unequal distribution. of the overthe surface thereof. The lever 4:?) serves as a support upon which theinatenz l to be baked may be placed. nv suitable ordesired constructionof (lQCLllC he: tii elements may be en'iploved on such construction,heing more particularly dcscrihed in the hereinhe'fore mentionedapplication.

In order to i it of controlling" the heatingelements at the top and {illthe bottom oi. the oven ehainhers p ovide inanin ally operable switches51 for controlling the upper heating element in each of the oven unitsand suhstantiall v similar switches 52 for manually controlling}; thelower heating element in each of the oven chambers. ll. provide itcasing; 53 suite. ly secured against the side of each of the oven unitsl 0 ii reeaaev.

provide a mounting for the switches as well as to provide a means forcovering the supply circuit conductors and the connections to theswitch. A removable cover plate 54 is provided on each of the casings 53to permit of ready access to the supply circuit conductors locatedwithin the casing.

A. Colby, Serial No. 4:74,822, 'fil8(l June 3,

1921, and assigned to the esting-house "Electric & ManufacturingCompany. A

thermally actuated controlling means for the motor-operated. switchcomprises a thermostat 58 operatively associated with each of the ovenunits. \Vhile this thermal con tr'ol member maybe of any suitable ordesired type, I prefer to employ that disclosed and cl'aimedin a cope-rding application of B. H. Smith, Serial No. 439,409. filed J anuary 24,1921, and assigned to the estinghouse Electric &,Manufacturing Company,to which reference may be had as to the operative details of the'device.Means for v carrying the supply circuit conductors beoven chamberthroughthe rear panel, a con-- 40 was "the .oven units 22.

tweenthe casing 53 and the motor-operated switch 55 may comprise arelatively short conduit 59 extending therebetween, As it is-desired tohave the supply conductor circuits directly connected to the heatingelement'in the individual oven units, enter the duit 61 is located oneach of the oven units at one side thereof and extends from the casing53 along the side of the oven unit and to a casing 62 located at'therear of This construction is employed mainly to give a finishedappearance to the entire structure. I

Avertically extending sectional ventilating, pipe 63 is located at theback of the oven units and has a portion extending into each of theindividual oven chambers 31 through a suitable opening 64 in the rearpanel. This construction is I not described more fully in detail as anysuitable or desired construction may be employed which will give thedesired results. i

As illustrate'din- Figs. 1 and 2 of the drawings, the bottom panel ofeach of the upper individual units completes the structure oftheloweroven unit, being effective to interposed a. \heat-insultingbarrier between the two adjacent superposed 'oven chambers. In order tocomplete the structure of the assembled entire oven, I pro- .vide a topor cover panel 65 of substantially the same construction as'the otherpanels nace.

top cover member 65.

and which may be piovided with suitable front and rear angle members 66and side angle bars 67 which may be connected by gusset plates 68 inorder to provide a rugged structure which shall not be subject todeformation during the operation of the furwith the topmost individualoven unit to complete the structure thereof and to'constitute aclosedbak-ing chamber "substan-q tially the same as the lowerbakingchambers.

If desired, means for securely clamping together, all ofthe superposedindividual open units and the top cover member may be provided and maycomprise a plurality of bolts 69, one being located at each corner ofthe assembled structure and operatively The cover member 65 cooperates.

engaging a member 71 at the bottom which is secured 'to thesupportingframe and a member 72 at the top which is secured to the1Vl1ile 1 have thus fard'escribcd individual oven units which areconstructed by the use of individual panels having shoulders attheiredges, I may dispense with these shoulders'and employ panels whichare provided with plain edges and are otherwise the same scribed. Thisconstruction is diagrammatically illustrated in Fig. 9 of the drawings,inwhich a bottom panel 73, side panels 74-, and a rear panel 75 arelocated in suitable spaced-apartrelation to constitute an opentop andopen-front oven chamber, a door panel 35, as hereinbefore described,being as those hereinbefore deoperatively associated therewith when theindividual oven unit is built up complete. A top or cover member 76completes the structure of-thetopmost individual oven unit, suitableangle bar members 77 being operatively associated with the top andbottom of the individual oven unit as also with the cover member,together with the hereinbefore described front and rear skeleton frames,to constitute a relatively rigid structure.

llC

If desired, practically the same units of i a series of; sizes of bakeovens and individual units may be built up'ot substantially integralbottom,s1de and rear wall panels,

substantially as illustrated diagrammatically in Fig. 10 of thedrawings. In this drawing, an outer sheet metal wall 78 is .spaced apartfrom an inner sheet metal wall c nnpletcd by a purl ion ol an upper orsnpci posed oven upit or by a cm'cl member placed upon the topmost ovenunit. ll desired the on us mils of the invlallatimi ol the supporting);means and ol a single oven unitprovided with a-covcr nici'nlwr lo"whit-h ma v be added any (l(%:-il1t?tl nninbcr o'l additional unitsvalch may be placed in proper o;. eruli-'c position upon i inal ovenunit bv removing the cover n'iciubcr and placing lhein in superposedposition on the original oven unit, the topinoset unit being completedby placing the originally employed cover inenn her thereon. he rodsroinprisiiur clamping nrcai n ay be replaced by rods as the number orindividual nulls nirreases thus pc -niililing of se airing isconliinuous Ope'l'llllii aliueuicnl of all parts of all the individualoven units in. proper operative po ions relatively to each other underall condi" ons of opera! ion.

obviousthat inc lirst oven mill. and the cover i'nemlier 11121 2 beraisci'l above th supporting: means to permit ol. plari sci-0nd 5ndsucceeding i a ,ncoinplcte ovcu uni, thereunder the bottom of theslumosed oven unilv conr lcting lhc structure of the oven unit .ncitl,below it. This method ol a lding new units is a more lalnu'ious one 'ianthat first descril'icd but perinils of i ineni ent with the lirsl: ovenunit.

i also obvious that the out" strnrture o'l oven units may be reversed.That is, the cover panel ma) be placed directly on the supporting meansand the propel-l3 constructed opcn-botloni oven unit he placed thereon,the twoinen'ibers constitulinga complete oven unit. The only change inconstruction of the incomplete oven unit is that relating to the frontdoor which, of course, should open downwardly as belore. fin additionaloven units may be placed upon the alr adv installed unit, theopeznbotl'oni lace lhcrcol being closed by the top portion or panel oflhc underneath unit. The means for securing th assembledincomplete ovenunils in close operative engagement may be the same as heretoforedescribed. This method of assembly ot a plurality of units, particularlywhen the additional units are added one after the other. is a relativelysimple one as the unit to be added to the alreiulv assci'i'rliiled unitsneed onl be placed thereon and the securing inc-ans installed andadditional electric-circuit conduclors proleaving the cover member inits original cn-- 'uction embodying nrv invention pcr vidcd to permit ofsuitably energizing: the heating elements in the newly installed in I orunits.

Various modifications may he made in llicw device embodying inv inventin vvitluiut drpartinrg from the spirit and scope the and I desire thatonly such limitations-a be placed 'ljh-ereoi'i as are in'incseu by priorair oi are specifically forth in appended claims. 's'iii cl"1n as my 1;notion:

l] ovcin in combination 5. oln 2y ell siperposcd.individual removableoven uni ach con o he: i-insniating pane at) an incon'iplcte oven unitthe othc oven unit and means for sharing suid "Jidual oven unisuper-postal pcsi relativel g to each o and clamp l" an? said individualoven u in (M erativc engagement relatiiuily in each i L. in a bake ovciuin combination) and upper separable incomp! iii, oven located in closeoperative sure member for the othcrw, oven Hill and a plurality olelements so sumioriel that i l. element is loalaal at the top and one helement at the bottom ol Bach ol sai units.

3. In a bake oreiu in coin rality of superposed. IRTUOFC oven units eachdcl d by a plurality o-. ro opcradiingl heat-insur ing punch-s means forlike holdii'igthe panels o l each oven in proper operative positionrelativc to each cthen and a hcat-insula in; panel constituting; aclosure member for the incomplete oven unit.

41:. In a bake oven, in combii'iatiom a pinrality of superposedremovable individiuil oven units each comprising plurility ofl'ieat-insulating panels co-operi ing to form an incomplete oven unit, aheat-insulating panel for closing the otherwise open oven unit, andelectric heating elen'ients adjacent the top and the bottom of each ofsaid indi vidual oven units, whereby the number cl superposed oven unitsmay be varied by the selective insertion or removal of an individualincomplete oven unit.

In a bake oven, in cotnloinution. a pin-- rality of incompleteindividual supcrposial removable oven units, a part of one unitcompleting; the structure 01'' an adjacent unit;" and a heat-insulatingpanel for completing the structure of one end unit.

6. in a bake oven, in conibinatiom a plurality of superposed individualincomplete removable oven units, each comprising a plurality oflrcatdnsulating panels co-opcrsting to form an open oven unit, aheatinsulating 'oanel for closing the otherwise open end oven unit andmeans for aliuin r tively to each other.

said oven units in superposed positions rela- 7 In a bake oven, incombination, a plurality of superposed removable open oven chambers,each defined by a plurality of cooperatlng heat-insulating panels, meansfor holding the panels of each oven in properoperative positionsrelatively to each other, and. a heat-insulating panel constituting aclosing member for the otherwise open oven chamber.

8. Ina bake oven, in combination, a pluan open oven unit, the open facesof all but one of said oven units being closed by a panel of an adjacentoven unit, and a heat insulating panel for closing the open face of saidone oven unit.

In testimony whereof, I have hereunto subscribed my name this 6th day ofMay,

HERMAN M. B-IEBE'L.

